Across
- 1. joining 2 or more things together
- 5. a force that attracts an object to the earth
- 11. the force between neutrons and protons
- 13. a star 10 times more massive than the sun
- 14. Einstein's formula of mass energy equivalence
- 15. an emission nebula made of gas from old red giant stars
- 18. the change in frequency of a wave or other periodic event
- 20. a subatomic particle, found in the nucleus, and has no electrical charge
- 21. a bright star that has a low mass
- 23. a defined region in space that absolutely nothing can get out of
Down
- 2. a cloud of dust and gas in space
- 3. a dense star made of electron-degenerate matter
- 4. the event that begins a star's life
- 6. the measureable amount of matter
- 7. a subatomic particle with a positive charge, that is found in the nucleus
- 8. a force acting on the outside
- 9. continuous band of stars that show up colorful rather than bright
- 10. a star with a regular mass and size
- 12. a white dwarf that has lost light and cooled significantly
- 16. a star with a small mass and size
- 17. a star made from a large star collapses, it is the smallest and densest star known
- 19. a mass of gas that shows the beginning of a star
- 22. The part of the atom that controls the rest of the cell, and holds the protons and neutrons
- 24. power made from physical or chemical resources